Gas absorbing and indicating apparatus for gas-analyzers.



1. w. & 0.. w. HAYS;

- GAS ABSORBlNG AND INDICATING APPARATUS FUR GAS ANALYZERS.-

APFLICAIION mzusur. 14. 1914.

1 1 53,9 1 2. Patented Sept. 21, 1915.

H. II I IIHLMM II H ll ml.

ii I! 'I El lfl W TNESSES: W

EINVENT Rs I JOSEPH w. Hays AND CHARLES w. HAYS, or ciiioaeo, ILLINOIS.

GAS ABSORBING- AND I NDICATING APPARATUS EUR GAS ANALYZEM.

Specification of Letters Patent.

Patented Sept. 231, i915.

priginal application filed July 17, 1913, Serial No. 779,547. Dividedand this application filed September 14,

' 1914. Seria1No.861,738.

. To all whom it may concern:

. Be it known that we, JOSEPH W. HAYS and CHARLES WV. HAYs," citizens ofthe v United States, residing in the city of Chi-- cago', county ofCook, and State of Illinois,

have invented certain new and useful Improvements in Gas Absorbing andIndicating Apparatus for. Gas-Analyzers, of which the following is aspecification.

Our invention relates especially to automatic gas analyzers but it maybe applied in a practical way to hand manipulated apparatus, as itafiords means for a direct reading of the result of the analysis whilethe gas is in the absorption vessel, thereby materially reducing thetime required to make a determination.

We attain the objects of our invention by the means illustrated in theaccompanying drawings, in which for the sake of -clearness we have shownonly thoseparts of our automatic gas analyzer that relate to the presentinvention. The fluid leveling device claimed in our copendingapplication, Serial N'umber 779,547, of which the present application isa division, and the temperature controlling device claimed in our c0-pending application, Serial Number 861,7 37 are not shown in thedrawing. In our copending application, Serial Number 861,736 we showanother means for accomplishing the same ends attained by the presentinvention. In the drawing, B is the burette or gas measuring chamberand.A the absorptioni chamber. These are connected by the capillarytube, CT. B -B is a rubber bag immersed in the chemical solution, PS,with which A is charged. The upper part. of A may be packed with afibrous material, SW if a a d OT are gas inlet and outlet the water theexact quantity of gas required tubes, leading respectively to and from BP is a gas pump, operated by a stream of water delivered through thepipe, W'P The water is discharged from P into the stand-pipe, 'StP Thestand-pipe is solwhen the water has accumulated in the stand-pipe to theoverflow point, OF. The tubes, IT and PP, connect with the pipes, IT-and OT as shown, and

are soldered into the top of WC BP is a by-pass valve, connecting thetubes, IT and OT.

The measurement of the gas sample at atmospheric pressure isaccomplished by means of the tube, MT. vand the gas'bag, GB ashereinafter described. The appagas pump, or aspirator, P which is operated by a small stream of water delivered through f WP creates apartial vacuum in the pipe, OT. This is eommunicatedto B and the pipe,lTlthe-latter being connected with the source of gas supply; As a resultof the lowered pressure, gas flows through, IT ,'B and OT to P where itmingles with the water. The water, W i's dischargedinto" StP andaccumulates in VC The water in a few moments reaches and seals the lowerend of StP whereupon a quantity of air is trappedin C, This air iscompressed by the static action of the water accumulating in StP As aresult ofthis pressure Water is displaced from .IT into the tubes, IT,OT ,a n d MT and the burette, B. lVhen the water reaches and seals thelower ends of the tubes IT and OT the flow of gas is shut off and aquantity of gas is trapped in B and MT The gas ow is shortcircuitedthrough BP folio ing the stoppage of flow through B? As the water risestoward B some of the trapped gas is displaced into MT and thedistensible gas bag, GB When MT is sealed by is trapped OH in B and inthe tube connecting the upper part of B with IT This exact quantity ofgas is measured .at

the pressure of the atmosphere. The water' partly filled with I thechamber .NVC through the-tubes, IT and greatly enpedites bag, RB. andwater is in turn expelled herefrom into the tube DT It is plain to beseen that the height-to which the water rises along the scale, 1S isinversely proportional to the volume -water, V, but such indicationcouldnot be relied upon. It would be necessary to make up a chemical solutionof apredetere mined specific gravity and the indications would-becorrect, assuming proper calibrat'ionof the scale, 5 IS, as long as,there was no material change in the gravity of the chemical solution.But the specific gravity of the-chemical solution would not remainconstant; It would change as the gas absorbed would form salts in thesolution. It would thereforebe impractical, for the above and otherreasons, to employ the absorber chemical as. an indicating fluid. Tomeet the requirements we have devised the arrangement, herein describedand claimed.

I By this arrangement we are able to confine the chemical in the chamberA: where it will not, be exposed to anything except the gas introducedinto A. It will be necessary in some cases to employ a chemical affectedby the oxygen of the air, and if such chemical were displaced into anopen tube and used as an indicating fluid it would rapidly deteriorate.The arrangement enables us to employ a liquid, such as water, for anindicating fluid and the specific gravity being constant, no error willresult in the indications. The use of the flexible rubber bag renders itpossible to transmit pressure from the one liquid to the otherwithoutloss.

\Ve claim: i

1. A gas analyzer consisting of gas measuring and absorber vessels; achemical in said absorber vessel; a tube sealed into said absorbervessel and a distensible bag within said vessel attached to said tube.

2. A gas analyzer consisting of connected gas measuring and absorbervessels; a liquid chemical in the absorber in said absorber vessel; adistensible bag within said vessel attached to said tube and a liquid insaid bag and said tube.

' 3; A gas analyzer consisting of connected gas measuring and absorbervessels: a liquid chemical in the absorber vessel a tube sealed intosaid absorber vessel; a distensible bag within said absorber vesselattached to said of gas absorbed in- A If 1t 1s desired .to produce arecord of thejanalysls, a low pressure recording gage the quantity ofliquid so displaced.

essel a tube sealed tube; a liquid in said oa'gand saidftube and lQAgasanalyzer cons1sting of connectedgas measuring and absorber vessels; aliquid chemical in said absorber vessel; a tube sealed into said vessel;a distensible bag within said vessel attached to said tube; a

liquid in said bag and said tube; means for forcing gas from saidmeasuring vessel into said absorber vessel thereby displacing'said l qud chemical, deflating said bag nd displaclng said liquid and means for masuring 5; A gas-analyzer consisting of connected gas measuring and gasabsorber vessels; a chemical in the absorber vessel; a distensiblt bagin said absorber vessel; a fluid in said bag; an exterior. connectionwith said bag;

means for forcing gas from said measuring vessel into said absorbervessel, deflating said bag and thereby applying pressure to the fluid insaid bag, .and means for mea's- 'uring the pressure applied to saidfluid.

6. A gas analyzer consisting of connected gas measuring and absorbervessels; a liqu d chemical-1n theabsorber vessel; means for forcing gasfrom said measuring vessel into the absorber vessel, displacing saidliquid chemical, and means for taking up the displacement of said liquidchemical.

'T. A. gas analyzer consisting of connected gas measuring and gasabsorber vessels; a liquid chemical in said absorber vessel; means forforcing gas from said measuring vessel into said absorber vessel, and acompressible body in said vessel to take up said displacement.

S. A'gas analyzer consisting of connected gas measuring and gas absorbervessels; a chemical in the absorber vessel; a tube sealed into saidabsorber vessel; a distensible bag within said vessel; attached to saidtube; a liquid in said bag and said tube; pressure means fortransferring gas from said measuring vessel to saidabsorber vessel,displacing the liquid in said bag and said tube, and

means for restoring the liquid in said tube .sis

cated therein and means for registering or indicating the compression ofsaid chamber 12. A gas analyzer consisting of 'a gas measuringmeans, agaslabsorber means and a pressure indicating means, thejlatter c011-ting of a compressible eha-mberPactuating an indicating device. f I if"131 A gas arialyzer eonsistingfo fconnected gas measuring and Qabsorberyessels, stWQ;

sorber vessel and sin separating medium be- .tWeen' said liquids.

In Witness whereof we have hereunto set J OSEPI7 I "W, HAYS. [10s,]GHARLES HAYS. '[L.s.] Witnesses: v HARVEY -G.. Hmrs,

' FLORENCE -M. N0RMAN;

our-hands and seals this 17th day pf August,

